* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    height: 100%
}

/* 主页头部 */
.headers {
    height: 80px;
    background: #4c3535;
    display: flex;
    justify-content: space-between;
    align-items: center;

}

.headers div:nth-of-type(1) {
    width: 300px;
    height: 60px;
    text-align: center;
    line-height: 60px;
}

.headers div:nth-of-type(1) img {
    width: 206px;
    height: 55px;
}

.headers div:nth-of-type(2) {
    height: 60px;
    text-align: center;
    width: 380px;
    line-height: 60px;
}

.headers div:nth-of-type(2) a {
    width: 100px;
    margin-left: 10px;
    text-decoration: none;
    color: #fff;
}

/* 内容区域 */
.containers {
    width: 100%;
    height: calc(100% - 80px);
    display: flex;
}

.containers .containers-left {
    width: 160px;
    height: 100%;
    background-color: #222;
}

.containers .containers-right {
    flex: 1;
    background-color: #fff;
    padding: 7px;
    background-color: #ded0d0;
}

iframe {
    width: 100%;
    height: 100%;
    border-radius: 10px;
    background-color: #F9FAFD;
}

.containers-left div {
    width: 100%;
    height: 60px;
    background-color: #333;
    color: #fff;
    border-bottom: 2px solid #fff;
    text-align: center;
    line-height: 60px;
}

.containers-left div>a {
    color: #fff !important;
}

.headers div:nth-of-type(2) a:hover {
    padding-bottom: 8px;
    border-bottom: 2px solid #B90000;
}



.dropdown i:nth-of-type(1) {
    transition: 3s;
}

.dropdown:hover i:nth-of-type(1) {
    transform: rotate(360deg);
}

a {
    text-decoration: none !important;
}